Air pump



FIG. 1 is a front elevational view of an air pump showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top and rear perspective view thereof;

FIG. 8 is a top, front and right side perspective view thereof;

FIG. 9 is a bottom, rear and right side perspective view thereof; and,

FIG. 10 is a bottom, rear and left side perspective view thereof.

The broken lines depict portions of an air pump and form no part of the claimed design. 

CLAIM The ornamental design for an air pump, as shown and described. 